27111252661 has 12 divisors (see below), whose sum is σ = 27758832192. Its totient is φ = 26466736824.

The previous prime is 27111252653. The next prime is 27111252667. The reversal of 27111252661 is 16625211172.

It is not a de Polignac number, because 27111252661 - 2³ = 27111252653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27111252667) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29500360 + ... + 29501278.

It is an arithmetic number, because the mean of its divisors is an integer number (2313236016).

Almost surely, 2^27111252661 is an apocalyptic number.

It is an amenable number.

27111252661 is a deficient number, since it is larger than the sum of its proper divisors (647579531).

27111252661 is an frugal number, since it uses more digits than its factorization.

27111252661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2568 (or 1649 counting only the distinct ones).

The product of its digits is 10080, while the sum is 34.

The spelling of 27111252661 in words is "twenty-seven billion, one hundred eleven million, two hundred fifty-two thousand, six hundred sixty-one".